Electrons (mass m, charge –e) are accelerated from rest through a potential difference v and are then deflected by a magnetic field that is perpendicular to their velocity. the radius of the resulting electron trajectory is:

Explanation:

Let m and e are the mass and charge of an electron. It is accelerated from rest through a potential difference V and are then deflected by a magnetic field that is perpendicular to their velocity. Let v is the velocity of the electron. It can be calculated as :

When the electron enters the magnetic field, the centripetal force is balanced by the magnetic force as :

or

So, the radius of the resulting electron trajectory is . Hence, this is the required solution.

the force required to move the cart is divided by three or 33.33 n.

the answer would be a